163603563356525 has 6 divisors (see below), whose sum is σ = 202868418562122. Its totient is φ = 130882850685200.

The previous prime is 163603563356501. The next prime is 163603563356581. The reversal of 163603563356525 is 525653365306361.

163603563356525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 677689521961 + 162925873834564 = 823219^2 + 12764242^2 .

It is not a de Polignac number, because 163603563356525 - 2¹² = 163603563352429 is a prime.

It is a super-2 number, since 2×163603563356525² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3272071267106 + ... + 3272071267155.

It is an arithmetic number, because the mean of its divisors is an integer number (33811403093687).

Almost surely, 2^{163603563356525} is an apocalyptic number.

It is an amenable number.

163603563356525 is a deficient number, since it is larger than the sum of its proper divisors (39264855205597).

163603563356525 is an equidigital number, since it uses as much as digits as its factorization.

163603563356525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6544142534271 (or 6544142534266 counting only the distinct ones).

The product of its (nonzero) digits is 131220000, while the sum is 59.

The spelling of 163603563356525 in words is "one hundred sixty-three trillion, six hundred three billion, five hundred sixty-three million, three hundred fifty-six thousand, five hundred twenty-five".